Book/Report

FZJ-2020-00663

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Rastertunnelmikroskopie und -spektroskopie an deponierten Einzelfullerenen: C$_{60}$, Ce@C$_{60}$ und La@C$_{60}$

Kann, G. H. (Corresponding author)FZJ*

2000
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/24084

Report No.: Juel-3834

Abstract: In this PhD thesis the electronic properties of a C$_{60}$-fullerenes, pure and endohedral doped with Ce and La, has been measured on individual molecules.C$_{60}$, Ce@C$_{60}$ and La@C$_{60}$ were produced in a pulsed laser vaporizationcluster source, deposited on HOPG, and examined topographically and spectroscopicallywith a scanning tunnel microscope. It is shown that Ce@C$_{60}$ hasa reduced band gap in contrasting to pure C$_{60}$. La@C$_{60}$ even exhibits a vanishingbandgap. The I(V)-curve identifies La@C$_{60}$ to be metallic-like whileC$_{60}$ and Ce@C$_{60}$ show semiconducting character. Moreover La@C$_{60}$ shows areversible opening of a band gap of 40 meV at a transition temperature of 28K $\pm$ 1 K. The disappearing of the tunneling current at temperatures under28 K could be explained with the freezing of lanthaniums movement in theC$_{60}$-Fullerene.

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Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000 ; Retrocat)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

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